I'm doing just that this week with a 6000L and an external 10gb laptop hard drive I put into an enclosure. The enclosure/drive draw too much power for the Zaurus to power by itself so I have a power adapter I'm taking along. I'm wondering whether I could use my iPod since it has it's own power source but haven't played with it yet to see whether I can convert it to fat32 without ruining it.

I've tried a test transfer from CF to the USB drive and it worked very well. I was then able to go to the files tab and browse it just fine and view the pictures. I'll post more about my success (or lack thereof) when I get back.